/*
 * Copyright 2013, 2014 Megion Research & Development GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * This code was extracted from the Java cryptography library from
 * www.bouncycastle.org. The code has been formatted to comply with
 * the rest of the formatting in this library.
 */
package org.beykery.util.bip44;

/**
 * implementation of RIPEMD see,
 * http://www.esat.kuleuven.ac.be/~bosselae/ripemd160.html
 */
public class RIPEMD160Digest extends GeneralDigest {
   private static final int DIGEST_LENGTH = 20;

   private int H0, H1, H2, H3, H4; // IV's

   private int[] X = new int[16];
   private int xOff;

   /**
    * Standard constructor
    */
   public RIPEMD160Digest() {
      reset();
   }

   /**
    * Copy constructor. This will copy the state of the provided message digest.
    */
   public RIPEMD160Digest(RIPEMD160Digest t) {
      super(t);

      H0 = t.H0;
      H1 = t.H1;
      H2 = t.H2;
      H3 = t.H3;
      H4 = t.H4;

      System.arraycopy(t.X, 0, X, 0, t.X.length);
      xOff = t.xOff;
   }

   public String getAlgorithmName() {
      return "RIPEMD160";
   }

   public int getDigestSize() {
      return DIGEST_LENGTH;
   }

   protected void processWord(byte[] in, int inOff) {
      X[xOff++] = (in[inOff] & 0xff) | ((in[inOff + 1] & 0xff) << 8) | ((in[inOff + 2] & 0xff) << 16)
            | ((in[inOff + 3] & 0xff) << 24);

      if (xOff == 16) {
         processBlock();
      }
   }

   protected void processLength(long bitLength) {
      if (xOff > 14) {
         processBlock();
      }

      X[14] = (int) (bitLength & 0xffffffff);
      X[15] = (int) (bitLength >>> 32);
   }

   private void unpackWord(int word, byte[] out, int outOff) {
      out[outOff] = (byte) word;
      out[outOff + 1] = (byte) (word >>> 8);
      out[outOff + 2] = (byte) (word >>> 16);
      out[outOff + 3] = (byte) (word >>> 24);
   }

   public int doFinal(byte[] out, int outOff) {
      finish();

      unpackWord(H0, out, outOff);
      unpackWord(H1, out, outOff + 4);
      unpackWord(H2, out, outOff + 8);
      unpackWord(H3, out, outOff + 12);
      unpackWord(H4, out, outOff + 16);

      reset();

      return DIGEST_LENGTH;
   }

   /**
    * reset the chaining variables to the IV values.
    */
   public void reset() {
      super.reset();

      H0 = 0x67452301;
      H1 = 0xefcdab89;
      H2 = 0x98badcfe;
      H3 = 0x10325476;
      H4 = 0xc3d2e1f0;

      xOff = 0;

      for (int i = 0; i != X.length; i++) {
         X[i] = 0;
      }
   }

   /*
    * rotate int x left n bits.
    */
   private int RL(int x, int n) {
      return (x << n) | (x >>> (32 - n));
   }

   /*
    * f1,f2,f3,f4,f5 are the basic RIPEMD160 functions.
    */

   /*
    * rounds 0-15
    */
   private int f1(int x, int y, int z) {
      return x ^ y ^ z;
   }

   /*
    * rounds 16-31
    */
   private int f2(int x, int y, int z) {
      return (x & y) | (~x & z);
   }

   /*
    * rounds 32-47
    */
   private int f3(int x, int y, int z) {
      return (x | ~y) ^ z;
   }

   /*
    * rounds 48-63
    */
   private int f4(int x, int y, int z) {
      return (x & z) | (y & ~z);
   }

   /*
    * rounds 64-79
    */
   private int f5(int x, int y, int z) {
      return x ^ (y | ~z);
   }

   protected void processBlock() {
      int a, aa;
      int b, bb;
      int c, cc;
      int d, dd;
      int e, ee;

      a = aa = H0;
      b = bb = H1;
      c = cc = H2;
      d = dd = H3;
      e = ee = H4;

      //
      // Rounds 1 - 16
      //
      // left
      a = RL(a + f1(b, c, d) + X[0], 11) + e;
      c = RL(c, 10);
      e = RL(e + f1(a, b, c) + X[1], 14) + d;
      b = RL(b, 10);
      d = RL(d + f1(e, a, b) + X[2], 15) + c;
      a = RL(a, 10);
      c = RL(c + f1(d, e, a) + X[3], 12) + b;
      e = RL(e, 10);
      b = RL(b + f1(c, d, e) + X[4], 5) + a;
      d = RL(d, 10);
      a = RL(a + f1(b, c, d) + X[5], 8) + e;
      c = RL(c, 10);
      e = RL(e + f1(a, b, c) + X[6], 7) + d;
      b = RL(b, 10);
      d = RL(d + f1(e, a, b) + X[7], 9) + c;
      a = RL(a, 10);
      c = RL(c + f1(d, e, a) + X[8], 11) + b;
      e = RL(e, 10);
      b = RL(b + f1(c, d, e) + X[9], 13) + a;
      d = RL(d, 10);
      a = RL(a + f1(b, c, d) + X[10], 14) + e;
      c = RL(c, 10);
      e = RL(e + f1(a, b, c) + X[11], 15) + d;
      b = RL(b, 10);
      d = RL(d + f1(e, a, b) + X[12], 6) + c;
      a = RL(a, 10);
      c = RL(c + f1(d, e, a) + X[13], 7) + b;
      e = RL(e, 10);
      b = RL(b + f1(c, d, e) + X[14], 9) + a;
      d = RL(d, 10);
      a = RL(a + f1(b, c, d) + X[15], 8) + e;
      c = RL(c, 10);

      // right
      aa = RL(aa + f5(bb, cc, dd) + X[5] + 0x50a28be6, 8) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f5(aa, bb, cc) + X[14] + 0x50a28be6, 9) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f5(ee, aa, bb) + X[7] + 0x50a28be6, 9) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f5(dd, ee, aa) + X[0] + 0x50a28be6, 11) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f5(cc, dd, ee) + X[9] + 0x50a28be6, 13) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f5(bb, cc, dd) + X[2] + 0x50a28be6, 15) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f5(aa, bb, cc) + X[11] + 0x50a28be6, 15) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f5(ee, aa, bb) + X[4] + 0x50a28be6, 5) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f5(dd, ee, aa) + X[13] + 0x50a28be6, 7) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f5(cc, dd, ee) + X[6] + 0x50a28be6, 7) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f5(bb, cc, dd) + X[15] + 0x50a28be6, 8) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f5(aa, bb, cc) + X[8] + 0x50a28be6, 11) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f5(ee, aa, bb) + X[1] + 0x50a28be6, 14) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f5(dd, ee, aa) + X[10] + 0x50a28be6, 14) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f5(cc, dd, ee) + X[3] + 0x50a28be6, 12) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f5(bb, cc, dd) + X[12] + 0x50a28be6, 6) + ee;
      cc = RL(cc, 10);

      //
      // Rounds 16-31
      //
      // left
      e = RL(e + f2(a, b, c) + X[7] + 0x5a827999, 7) + d;
      b = RL(b, 10);
      d = RL(d + f2(e, a, b) + X[4] + 0x5a827999, 6) + c;
      a = RL(a, 10);
      c = RL(c + f2(d, e, a) + X[13] + 0x5a827999, 8) + b;
      e = RL(e, 10);
      b = RL(b + f2(c, d, e) + X[1] + 0x5a827999, 13) + a;
      d = RL(d, 10);
      a = RL(a + f2(b, c, d) + X[10] + 0x5a827999, 11) + e;
      c = RL(c, 10);
      e = RL(e + f2(a, b, c) + X[6] + 0x5a827999, 9) + d;
      b = RL(b, 10);
      d = RL(d + f2(e, a, b) + X[15] + 0x5a827999, 7) + c;
      a = RL(a, 10);
      c = RL(c + f2(d, e, a) + X[3] + 0x5a827999, 15) + b;
      e = RL(e, 10);
      b = RL(b + f2(c, d, e) + X[12] + 0x5a827999, 7) + a;
      d = RL(d, 10);
      a = RL(a + f2(b, c, d) + X[0] + 0x5a827999, 12) + e;
      c = RL(c, 10);
      e = RL(e + f2(a, b, c) + X[9] + 0x5a827999, 15) + d;
      b = RL(b, 10);
      d = RL(d + f2(e, a, b) + X[5] + 0x5a827999, 9) + c;
      a = RL(a, 10);
      c = RL(c + f2(d, e, a) + X[2] + 0x5a827999, 11) + b;
      e = RL(e, 10);
      b = RL(b + f2(c, d, e) + X[14] + 0x5a827999, 7) + a;
      d = RL(d, 10);
      a = RL(a + f2(b, c, d) + X[11] + 0x5a827999, 13) + e;
      c = RL(c, 10);
      e = RL(e + f2(a, b, c) + X[8] + 0x5a827999, 12) + d;
      b = RL(b, 10);

      // right
      ee = RL(ee + f4(aa, bb, cc) + X[6] + 0x5c4dd124, 9) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f4(ee, aa, bb) + X[11] + 0x5c4dd124, 13) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f4(dd, ee, aa) + X[3] + 0x5c4dd124, 15) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f4(cc, dd, ee) + X[7] + 0x5c4dd124, 7) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f4(bb, cc, dd) + X[0] + 0x5c4dd124, 12) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f4(aa, bb, cc) + X[13] + 0x5c4dd124, 8) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f4(ee, aa, bb) + X[5] + 0x5c4dd124, 9) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f4(dd, ee, aa) + X[10] + 0x5c4dd124, 11) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f4(cc, dd, ee) + X[14] + 0x5c4dd124, 7) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f4(bb, cc, dd) + X[15] + 0x5c4dd124, 7) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f4(aa, bb, cc) + X[8] + 0x5c4dd124, 12) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f4(ee, aa, bb) + X[12] + 0x5c4dd124, 7) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f4(dd, ee, aa) + X[4] + 0x5c4dd124, 6) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f4(cc, dd, ee) + X[9] + 0x5c4dd124, 15) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f4(bb, cc, dd) + X[1] + 0x5c4dd124, 13) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f4(aa, bb, cc) + X[2] + 0x5c4dd124, 11) + dd;
      bb = RL(bb, 10);

      //
      // Rounds 32-47
      //
      // left
      d = RL(d + f3(e, a, b) + X[3] + 0x6ed9eba1, 11) + c;
      a = RL(a, 10);
      c = RL(c + f3(d, e, a) + X[10] + 0x6ed9eba1, 13) + b;
      e = RL(e, 10);
      b = RL(b + f3(c, d, e) + X[14] + 0x6ed9eba1, 6) + a;
      d = RL(d, 10);
      a = RL(a + f3(b, c, d) + X[4] + 0x6ed9eba1, 7) + e;
      c = RL(c, 10);
      e = RL(e + f3(a, b, c) + X[9] + 0x6ed9eba1, 14) + d;
      b = RL(b, 10);
      d = RL(d + f3(e, a, b) + X[15] + 0x6ed9eba1, 9) + c;
      a = RL(a, 10);
      c = RL(c + f3(d, e, a) + X[8] + 0x6ed9eba1, 13) + b;
      e = RL(e, 10);
      b = RL(b + f3(c, d, e) + X[1] + 0x6ed9eba1, 15) + a;
      d = RL(d, 10);
      a = RL(a + f3(b, c, d) + X[2] + 0x6ed9eba1, 14) + e;
      c = RL(c, 10);
      e = RL(e + f3(a, b, c) + X[7] + 0x6ed9eba1, 8) + d;
      b = RL(b, 10);
      d = RL(d + f3(e, a, b) + X[0] + 0x6ed9eba1, 13) + c;
      a = RL(a, 10);
      c = RL(c + f3(d, e, a) + X[6] + 0x6ed9eba1, 6) + b;
      e = RL(e, 10);
      b = RL(b + f3(c, d, e) + X[13] + 0x6ed9eba1, 5) + a;
      d = RL(d, 10);
      a = RL(a + f3(b, c, d) + X[11] + 0x6ed9eba1, 12) + e;
      c = RL(c, 10);
      e = RL(e + f3(a, b, c) + X[5] + 0x6ed9eba1, 7) + d;
      b = RL(b, 10);
      d = RL(d + f3(e, a, b) + X[12] + 0x6ed9eba1, 5) + c;
      a = RL(a, 10);

      // right
      dd = RL(dd + f3(ee, aa, bb) + X[15] + 0x6d703ef3, 9) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f3(dd, ee, aa) + X[5] + 0x6d703ef3, 7) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f3(cc, dd, ee) + X[1] + 0x6d703ef3, 15) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f3(bb, cc, dd) + X[3] + 0x6d703ef3, 11) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f3(aa, bb, cc) + X[7] + 0x6d703ef3, 8) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f3(ee, aa, bb) + X[14] + 0x6d703ef3, 6) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f3(dd, ee, aa) + X[6] + 0x6d703ef3, 6) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f3(cc, dd, ee) + X[9] + 0x6d703ef3, 14) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f3(bb, cc, dd) + X[11] + 0x6d703ef3, 12) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f3(aa, bb, cc) + X[8] + 0x6d703ef3, 13) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f3(ee, aa, bb) + X[12] + 0x6d703ef3, 5) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f3(dd, ee, aa) + X[2] + 0x6d703ef3, 14) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f3(cc, dd, ee) + X[10] + 0x6d703ef3, 13) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f3(bb, cc, dd) + X[0] + 0x6d703ef3, 13) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f3(aa, bb, cc) + X[4] + 0x6d703ef3, 7) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f3(ee, aa, bb) + X[13] + 0x6d703ef3, 5) + cc;
      aa = RL(aa, 10);

      //
      // Rounds 48-63
      //
      // left
      c = RL(c + f4(d, e, a) + X[1] + 0x8f1bbcdc, 11) + b;
      e = RL(e, 10);
      b = RL(b + f4(c, d, e) + X[9] + 0x8f1bbcdc, 12) + a;
      d = RL(d, 10);
      a = RL(a + f4(b, c, d) + X[11] + 0x8f1bbcdc, 14) + e;
      c = RL(c, 10);
      e = RL(e + f4(a, b, c) + X[10] + 0x8f1bbcdc, 15) + d;
      b = RL(b, 10);
      d = RL(d + f4(e, a, b) + X[0] + 0x8f1bbcdc, 14) + c;
      a = RL(a, 10);
      c = RL(c + f4(d, e, a) + X[8] + 0x8f1bbcdc, 15) + b;
      e = RL(e, 10);
      b = RL(b + f4(c, d, e) + X[12] + 0x8f1bbcdc, 9) + a;
      d = RL(d, 10);
      a = RL(a + f4(b, c, d) + X[4] + 0x8f1bbcdc, 8) + e;
      c = RL(c, 10);
      e = RL(e + f4(a, b, c) + X[13] + 0x8f1bbcdc, 9) + d;
      b = RL(b, 10);
      d = RL(d + f4(e, a, b) + X[3] + 0x8f1bbcdc, 14) + c;
      a = RL(a, 10);
      c = RL(c + f4(d, e, a) + X[7] + 0x8f1bbcdc, 5) + b;
      e = RL(e, 10);
      b = RL(b + f4(c, d, e) + X[15] + 0x8f1bbcdc, 6) + a;
      d = RL(d, 10);
      a = RL(a + f4(b, c, d) + X[14] + 0x8f1bbcdc, 8) + e;
      c = RL(c, 10);
      e = RL(e + f4(a, b, c) + X[5] + 0x8f1bbcdc, 6) + d;
      b = RL(b, 10);
      d = RL(d + f4(e, a, b) + X[6] + 0x8f1bbcdc, 5) + c;
      a = RL(a, 10);
      c = RL(c + f4(d, e, a) + X[2] + 0x8f1bbcdc, 12) + b;
      e = RL(e, 10);

      // right
      cc = RL(cc + f2(dd, ee, aa) + X[8] + 0x7a6d76e9, 15) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f2(cc, dd, ee) + X[6] + 0x7a6d76e9, 5) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f2(bb, cc, dd) + X[4] + 0x7a6d76e9, 8) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f2(aa, bb, cc) + X[1] + 0x7a6d76e9, 11) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f2(ee, aa, bb) + X[3] + 0x7a6d76e9, 14) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f2(dd, ee, aa) + X[11] + 0x7a6d76e9, 14) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f2(cc, dd, ee) + X[15] + 0x7a6d76e9, 6) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f2(bb, cc, dd) + X[0] + 0x7a6d76e9, 14) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f2(aa, bb, cc) + X[5] + 0x7a6d76e9, 6) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f2(ee, aa, bb) + X[12] + 0x7a6d76e9, 9) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f2(dd, ee, aa) + X[2] + 0x7a6d76e9, 12) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f2(cc, dd, ee) + X[13] + 0x7a6d76e9, 9) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f2(bb, cc, dd) + X[9] + 0x7a6d76e9, 12) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f2(aa, bb, cc) + X[7] + 0x7a6d76e9, 5) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f2(ee, aa, bb) + X[10] + 0x7a6d76e9, 15) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f2(dd, ee, aa) + X[14] + 0x7a6d76e9, 8) + bb;
      ee = RL(ee, 10);

      //
      // Rounds 64-79
      //
      // left
      b = RL(b + f5(c, d, e) + X[4] + 0xa953fd4e, 9) + a;
      d = RL(d, 10);
      a = RL(a + f5(b, c, d) + X[0] + 0xa953fd4e, 15) + e;
      c = RL(c, 10);
      e = RL(e + f5(a, b, c) + X[5] + 0xa953fd4e, 5) + d;
      b = RL(b, 10);
      d = RL(d + f5(e, a, b) + X[9] + 0xa953fd4e, 11) + c;
      a = RL(a, 10);
      c = RL(c + f5(d, e, a) + X[7] + 0xa953fd4e, 6) + b;
      e = RL(e, 10);
      b = RL(b + f5(c, d, e) + X[12] + 0xa953fd4e, 8) + a;
      d = RL(d, 10);
      a = RL(a + f5(b, c, d) + X[2] + 0xa953fd4e, 13) + e;
      c = RL(c, 10);
      e = RL(e + f5(a, b, c) + X[10] + 0xa953fd4e, 12) + d;
      b = RL(b, 10);
      d = RL(d + f5(e, a, b) + X[14] + 0xa953fd4e, 5) + c;
      a = RL(a, 10);
      c = RL(c + f5(d, e, a) + X[1] + 0xa953fd4e, 12) + b;
      e = RL(e, 10);
      b = RL(b + f5(c, d, e) + X[3] + 0xa953fd4e, 13) + a;
      d = RL(d, 10);
      a = RL(a + f5(b, c, d) + X[8] + 0xa953fd4e, 14) + e;
      c = RL(c, 10);
      e = RL(e + f5(a, b, c) + X[11] + 0xa953fd4e, 11) + d;
      b = RL(b, 10);
      d = RL(d + f5(e, a, b) + X[6] + 0xa953fd4e, 8) + c;
      a = RL(a, 10);
      c = RL(c + f5(d, e, a) + X[15] + 0xa953fd4e, 5) + b;
      e = RL(e, 10);
      b = RL(b + f5(c, d, e) + X[13] + 0xa953fd4e, 6) + a;
      d = RL(d, 10);

      // right
      bb = RL(bb + f1(cc, dd, ee) + X[12], 8) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f1(bb, cc, dd) + X[15], 5) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f1(aa, bb, cc) + X[10], 12) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f1(ee, aa, bb) + X[4], 9) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f1(dd, ee, aa) + X[1], 12) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f1(cc, dd, ee) + X[5], 5) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f1(bb, cc, dd) + X[8], 14) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f1(aa, bb, cc) + X[7], 6) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f1(ee, aa, bb) + X[6], 8) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f1(dd, ee, aa) + X[2], 13) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f1(cc, dd, ee) + X[13], 6) + aa;
      dd = RL(dd, 10);
      aa = RL(aa + f1(bb, cc, dd) + X[14], 5) + ee;
      cc = RL(cc, 10);
      ee = RL(ee + f1(aa, bb, cc) + X[0], 15) + dd;
      bb = RL(bb, 10);
      dd = RL(dd + f1(ee, aa, bb) + X[3], 13) + cc;
      aa = RL(aa, 10);
      cc = RL(cc + f1(dd, ee, aa) + X[9], 11) + bb;
      ee = RL(ee, 10);
      bb = RL(bb + f1(cc, dd, ee) + X[11], 11) + aa;
      dd = RL(dd, 10);

      dd += c + H1;
      H1 = H2 + d + ee;
      H2 = H3 + e + aa;
      H3 = H4 + a + bb;
      H4 = H0 + b + cc;
      H0 = dd;

      //
      // reset the offset and clean out the word buffer.
      //
      xOff = 0;
      for (int i = 0; i != X.length; i++) {
         X[i] = 0;
      }
   }
}
